While the bottles are untouched, the labels have faded away long time ago. There are five different sorts (with three bottles each) and later they can investigate what they do (or they can use them at random, but that might be a bad idea);

1) turns polluted waters into safe waters
2) saves someone from certain death (can't be replicated as most of the ingredients are impossible to get)
3) makes someone immune to pain
4) makes the users soul into a shield to protect the remaining party (fatal to user)
5) duplicates any item (non-magical kind) immediately